Earth Sciences 1070A/B Lecture Notes - Lecture 4: Silicate Minerals, Breccia, Siliciclastic

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 1070A/B
• Professor: Natalie Pietrzak- Renaud

Document Summary

Geology week 4: what are the mechanical and chemical processes that weather rock, mechanical weathering a process that involves the physical breakdown or disintegration of rocks from large pieces to smaller ones without changing their composition. Clays and quartz are the most abundant weathering byproducts of silicate minerals (i. e feldspars). Clastic sedimentary rocks are named based on the fragment size they contain, with no implication as to the composition of these fragments. The grain size of a sedimentary rock contains useful information about environments of deposition and how far the material travelled from its original unweathered host rock. Easily weathered amph, olivine, pyroxene, biotite, feldspar. Resistant to weathering quarts, mica, muscovite, biotite, feldspar. Minerals gypsum, alabastar, calite, quarts, magnetite, hematite, gypsum-selenite, gypsum. Rocks gypsum-alabastar, gypsum selenite, gyspum satinspar, bauxite, arkose, fossiliferous limestone, bitumous coal, rock salt, limestone, conglomerate, shale, breccia, sandstone. Chemical gypsum alabastar, gypsum selenite, gypsum satin spar, fossiliferous limestone, Siliciclastic bauxite, arkose, bitumous coal, conglomerate, shale, breccia, sandstone.